<template>
  <div class="cmt-container">
    <h3>发表评论</h3>
    <hr />
    <textarea
      placeholder="请输入BB的内容（最多吐槽120字）"
      maxlength="120"
      v-model="msg"
    ></textarea>

    <mt-button type="primary" size="large" @click="postComment"
      >发表评论</mt-button
    >

    <div class="cmt-list">
      <div class="cmt-item" v-for="(item, i) in comments" :key="item.add_time">
        <div class="cmt-title">
          第{{ i + 1 }}楼&nbsp;&nbsp;用户：{{
            item.user_name
          }}&nbsp;&nbsp;发表时间：{{ item.add_time | dateFormat }}
        </div>
        <div class="cmt-body">
          {{
            item.content === "undefined" ? "此用户很懒，嘛都没说" : item.content
          }}
        </div>
      </div>
    </div>
    <mt-button type="primary" size="large" plain @click="getmore"
      >加载更多</mt-button
    >
  </div>
</template>
<script>
import { Toast } from "mint-ui";
export default {
  data() {
    return {
      pageindex: 1,
      comments: [],
      msg: ""
    };
  },
  created() {
    this.getConmments();
  },
  methods: {
    getConmments() {
      this.$http
        .get("api/getcomments/" + this.id + "?pageindex=" + this.pageindex)
        .then(result => {
          if (result.body.status === 0) {
            //this.comments = result.body.message;
            //老数据拼接新数据
            this.comments = this.comments.concat(result.body.message);
          } else {
            Toast("评论加载失败！");
          }
        });
    },
    getmore() {
      this.pageindex++;
      this.getConmments();
    },

    
    postComment() {
      if(this.msg.trim().length===0){
      return Toast("评论内容不能为空")
    }
      this.$http.post("api/postcomment/" + this.$route.params.id, {
        content: this.msg.trim()
      })
      .then(function(result){
        if(result.body.status===0){
          var cmt={
            user_name:"匿名用户",
            add_time:Date.now(),
            content:this.msg.trim()
          };
          this.comments.unshift(cmt);
          this.msg="";
        }

      });
    }
  },
  props: ["id"]
};
</script>
<style lang="scss" scoped>
.cmt-container {
  h3 {
    font-size: 18px;
  }
  textarea {
    font-size: 14px;
    height: 85px;
    margin: 0;
  }
  .cmt-list {
    margin: 5px 0;
    .cmt-item {
      font-size: 13px;
      .cmt-item {
        line-height: 30px;
        background-color: white;
      }
      .cmt-body {
        line-height: 35px;
        text-indent: 2em;
      }
    }
  }
}
</style>